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PP-R plastics tube/pipe and pipe fittings true 伪识别 method
production combined PP-R tube/pipe must for raw materials and extrusion equipment has requirements. can production cold hot water tube/pipe PP specialized raw materials has types:
1, homopolymer PP add 入一定 amount toughened additives blending pelletizing formed, this type of raw materials 称之PP-H.
2, using/adopting PP and PE嵌段 copolymer, this type of raw materials 称之PP-B.
3, using/adopting gas versus copolymer process, PE in PP separation in machine, uniform polymerization, this type of raw materials 称之PP-R.
used for production PP-R plastics tube/pipe extrusion machine screw material need use 先进 计算 machine type 精确计算 确定各段 pressure distribution, melt speed rate, make its has good low temperature can force. mono screw extrusion machine is can use production PP-R tube/pipe.
currently market upper PP-R tube/pipe 70-80%都不 is true positive PP-R tube/pipe. is use can from outer and upper 初步识别 true 伪PP-R tube/pipe and pipe fittings.
can below/following 几点识别 methods:
(1) product 名称: PP-R product 名称应 is “ cold hot water use polypropylene (PP) tube/pipe or “ cold hot water use PP-R tube/pipe ”凡冠以 ultra- fine pellets modified polypropylene (PP) tube/pipe (PP-R) or PP-R cold water tube/pipe, PP-R hot water tube/pipe, PP-E tube/pipe and other, non positive 规名称 均 is 伪PP-R tube/pipe.
(2) product testing mono non mono 位, testing project inner and PP-R tube/pipe standards inner 容不符, product recommendation or product 推广部门, for PP-R product standards understanding or 无PP-R standards 部门 出 tool certificate 均 伪PP-R.
(3)伪PP-R density ratio PP-R略 large.
(4)PP-R tube/pipe white light or its it color color light, 伪PP-R tube/pipe gloss or color color 鲜艳.
(5)PP-R tube/pipe full light, 伪PP-R tube/pipe light micro light or semi light.
(6)PP-R tube/pipe 手感柔 and, 伪PP-R tube/pipe light slip.
(7)PP-R tube/pipe 落 声 relatively 沉闷, 伪PP-R tube/pipe 落 声 relatively 清脆.
true positive PP-R tube/pipe combined standards ISO/DIS 15874.2-1999 《 cold hot water use plastics pipeline system --PP第二部 separation pipe/tube 》 pipe fittings combined standards ISO/DIS 15874.2-1999, 《 cold hot water use plastics pipeline system --PP第三部 separation pipe fittings 》;伪PP-R pipeline and pipe fittings property can is method through upper standards. 应当指出, 伪PP-R tube/pipe use lifespan is 1-5 year, true positive PP-R tube/pipe use lifespan in 50 year above.
